期刊
ENERGY
卷 36, 期 8, 页码 5292-5300出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2011.06.037
关键词
SAGCHP; Experiment; Heating; Operation modes; Borehole temperature
资金
- Research Grants Council of the Hong Kong Special Administrative Region, China [PolyU 5332/08E]
- Hebei Academy of Sciences, China
This paper presents experimental studies on a solar-assisted ground coupled heat pump (SAGCHP) system for space heating. The system was installed at the Hebei Academy of Sciences in Shijiazhuang (lat. N38 degrees 03', long. E114 degrees 26'), China. Solar collectors are in series connection with the borehole array through plate heat exchangers. Four operation modes of the system were investigated throughout the coldest period in winter (Dec 5th to Dec 27th). The heat pump performance, borehole temperature distributions and solar colleting characteristics of the SAGCHP system are analyzed and compared when the system worked in continuous or intermittent modes with or without solar-assisted heating. The SAGCHP system is proved to perform space heating with high energy efficiency and satisfactory solar fraction, which is a promising substitute for the conventional heating systems. It is also recommended to use the collected solar thermal energy as an alternative source for the heat pump instead of recharging boreholes for heat storage because of the enormous heat capacity of the earth. (C) 2011 Elsevier Ltd. All rights reserved.
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